One of the most widely used current potty training books says straight out that though most grown-ups might not really understand, “all your child has known … is the warm, cozy feeling of her poop against her butt. … It seems pretty gross to us as grown-ups, but it feels really good to kids.”
The author has been the “potty training coach” to thousands (imagine that as your profession), and says some of the kids old enough to talk will tell her “I like the warm feeling of my pee and poop in my diaper.” She adds, “Good thing they’re cute, huh?”
(I like it too,
@denis97y, in the way you describe. I love to feel like a toddler that way. I stay poopy longer when I do it, and really enjoy the naughtiness and innocence and all the sensations of it. Maybe that’s because I only get the chance rarely and want to make the most of it.)